Hendell:
The flaw with Waterdeep is that it is in the the Forgotten Realms which causes all sorts of problems and or confusion with any degree of world customization for the game, to many people know to much about it and think that matters.
That's why you state your world is not Canon.
It can work in Forgotten Realms in Waterdeep, There is also Thesk which is run by rogues and cleric of the god of rogues.
There is Sharn in Eberron as well which makes a great place for it too.
I am new to 5th edition, but I'd try if allowed.
This message was last edited by the user at 04:14, Thu 30 Aug 2018.